Keying means for crushing-rolls.



C. G. BUCHANAN.

KEYING MEANS FOR' CRUSHING ROLLS.

APPLICATION mu) MAR.15. 19x2.

1,149,626. latmltudAug; 10, 1915.

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UNITED sTATEs PATENT onnion.

CHARLES G. BUCHANAN, OF NEW YORK, N. Y.

KEYING MEANS FOR CRUSHING-ROL'LS.

Specification of Letters Patent.

Patented Aug. 10, 1915.

Original application filed December 27, 1907, Serial No. 408,246. Divided and this application filed March 15,1912. Seria1No.683 ,917.

. T all whom it may concern:

Be it known that I, CHARLES Gr. BUCHAN AN, a citizen ofthe United. States, residing at 90 Vest streettinthe city'and county of New York and State of New York, have invented certain new and useful Improvements in Keying Means for Crushing Rolls, of which the following is a full, clear, and exact specification.

This invention relates to rolls for crushing machines and more particularly relates to an improvement in the mounting of a detachable shell on the roller hub in such manner that it may be readily detached when worn out or broken, and which will be prevented from turning on the hub by means independent of the fastening device which normally holds the shell and, hub together, and which shall form a strong andsecure structure to resist the enormous strains to which crushing rolls aresubjected.

The invention of the present application is adapted for use in connection with the crushing machine shown in my application filed December 27, 1907, SerialNo. @8246,

and was disclosed therein when that application was filed. The present application is a division of the earlier application mentioned.

The invention w1ll be set forth more in detail in connection with the accompanying drawings, of which Figure 1 is a longitudinal section of a crushing roll embodyingthe present invention; and Fig. 2 is an end elevation of theroll of Fig. 1 viewed in the direction as indicated by the arrow 2.

Referring to the drawings, the roll shaft 1, which is to be mounted in suitable bearings in the crushing machine, is provided with a key 2, and a roll hub 3 is forced thereon by hydraulic pressure and held by the key 2. The hub, 3 is provided with three equidistant holes 4 in which lugs 5 on a sliding ring 6 engage to prevent rotation ofv the ring 6 relatively to the hub 3 and a hardened steel shell 7 is wedged on the beveled, periphery of the hub 3 by means of bolts' 8 passing through the ring 6 and the hub alternately with the .holes 4: to rec 'ive the lugs 5. As will be seen thy shell has two internal beveled faces which meet on the line 9. In case it should be desired to remove the shell and the ring 6 should stick,

tools can'-be inserted through the holes 4 and the ring driven off. Preferabl'y, the

hub at the portion where the ring slides is crushing strain upon the roll is thustaken directly upon the hub, the large bearing surface thereon for the'shell providing a secure and rugged. construction capable of resisting the crushing strains.

.In'st'ructures of the character to which thisapplication relates, where the parts are wedged together 'by tightening up bolts, the

bolt holes are-commonly used as drift holes. After the bolts have been removed, a tool of less diameter than the hole may be placed in the hole at an angle and made to engage with an edgeiof the member to be driven'oif. A roll maybe disassembled in the manner just described, but it is found in practice that, owing to inaccuracy of alinement, the parts will often bind upon the ends of the bolts so that there may be difliculty in separating them, and, in any event, the parts cannot bedrifted apart until the bolts have been at least partially removed. served that, according to the present invention, this practical disadvantage is obviated byproviding holes other than the bolt holes, whichare always open and available for drifting the ring off the ends of the bolts and away fromthe hub. It will also beobserved that according to the present invention the projections from the ring 6 'I'Bl11- tween the ring and the hub. Moreover, the

projections serve to hold the parts in alinement while the bolts are being entered. It will be seen that the roll can always be assembled with certainty and facility and without danger of destroying the bolts as It will be oboften takes place when it is necessary to forcibly drive out the bolts before the roll can be disassembled, and which is almost sure to take place, at least to the extent of destroying the threads, when the bolts are used for drifting rods. The interlocking projections, permitting smaller bolts to be used for holding the structure together as above set forth, permit smaller holes for the bolts to be used, thereby reducing the amount of material necessary to be removed at any one hole and therefore lessening the weakening of the structure at any particular point. The use of a ring as the clamping member for binding the shell against the hub effects this result in a peculiarly secure and accurate manner and with a minimum number of parts.

The structure set forth not only has the advantages of providing a strong, accurate and simple clamping means for securing the shell, of lessening the size of the bolts required, of providing drift holes open at all times so that the roll can be assembled or disassembled with facility.and without destruction or damage, of reducing the material removed and therefore the weakening of the section at any given bolt hole, but it has the further advantage of utilizing the drift holes thus provided for the reception of the interlocking projections so that the drift holes serve a dual function, and thereby the structure is simplified and the labor necessary to manufacture is greatly decreased while the strength is increased.

Inasmuch as the invention is capable of various changes and modifications, it is not to be restricted to the exact construction which has been shown and described.

Having thus described my invention, I declare that what I claim as new and desire to secure by Letters Patent is:

l. The combination with a shaft, of a hub keyed thereto and having a conical surface, an annular rotary shell having two interior intersecting conical surfaces, one of said surfaces engaging the said conical surface of the hub. a ring having a beveled face engaging with the other beveled surface of said shell and wedging said shell on said hub, means interlocking said ring and hub against rotation, and bolts drawing said ring and hub longitudinally together.

2. The combination with a shaft. of a hub keyed thereto and having a conical surface, an annular rotary shell having two interior intersecting conical surfaces, one of said surfaces engaging the said conical surface of the hub. a ring having a beveled face engaging with the other beveled surface of said shell and wedging said shell on said hub, longitudinal holes in said hub adapted to receive and interlock with projections carried by said ring, and bolts alternating with said projections and passing throu rh said hub and ring to lock said hub, shell and ring together.

In testimony whereof I aflix my signature, in presence of two witnesses.

CHARLES G. BUCHANAN.

lVitnesses J. S. lVoosTER, G. N. KERR. 

